1. Let’s find what mass of salt is in the initial solution:
m (salt) = w (salt) * misk (solution) = 0.3 * 150 = 45 g;
2. calculate the mass of the new solution:
mnov (solution) = mout (solution) + madd (H2O) = 150 + 20 = 170 g;
3.Calculate the mass fraction of salt in the resulting solution:
wnew (salt) = m (salt): mnew (solution) = 45: 170 = 0.2647, or 26.47%.
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